16/10/2026
📡 PIR Sensor vs Radar Sensor: What’s the Difference? 💡
Not all motion-sensor lights work the same way! Choosing the right sensor ensures maximum energy savings and prevents annoying false triggers.
Here is a quick product knowledge guide from ESL Lighting to help you choose the right sensor for your project:
🔵 1. PIR SENSOR (Passive Infrared)
✅ How it works: Detects changes in body heat moving across its field of view.
✅ Key Specs: Detects direct human movement only; cannot see through walls, glass, or plastic.
✅ Environment: Can be triggered by sudden heat changes (sunlight, aircon units).
✅ Best for: Indoor spaces with stable temperatures (offices, home corridors, bedrooms).
👉 Summary: Affordable, budget-friendly, and energy-efficient for everyday indoor use.
🟢 2. RADAR SENSOR (Microwave Radar)
📍 How it works: Emits microwave signals and detects movement by measuring changes in the echo reflection.
📍Key Specs: Highly sensitive—can detect movement through walls, glass, and thin partitions!
📍 Environment: Unaffected by heat, air currents, or light changes.
📍 Best for: Complex or outdoor spaces (warehouses, basements, parking lots, bathrooms).
👉 Summary: Advanced, highly sensitive, and ultra-reliable for challenging environments.
💡 QUICK SELECTION TIP:
👉 Choose PIR for simple indoor lighting controls on a budget.
👉 Choose RADAR for non-line-of-sight spaces, high sensitivity, or harsh outdoor conditions.
Both sensors save energy and boost convenience choose the right technology for your space with ESL Lighting!
